KK Accessories

Discover the Ko-Ken collection at Freer Tool & Supply—your destination for premium Japanese hand tools and sockets renowned for precision, durability, and professional performance. Our selection includes Ko-Ken’s high-quality impact sockets, ratchets, extensions, and specialty tools, all engineered for demanding automotive, industrial, and maintenance applications. Whether you’re a technician, mechanic, or industry professional, Ko-Ken tools deliver the reliability and accuracy you need for every job.


Ko-ken 15544A 5/8 Sq. Dr. Adaptor  1/2 Square Length 46mm Hole type

Ko-ken 15544A 5/8 Sq. Dr. Adaptor 1/2 Square Length 46mm Hole type

SKU: KK-15544A
MPN: 15544A

Sale price $49.56 List price $61.94
Save $12.38
Ko-ken 15544A-P 5/8 Sq. Dr. Adaptor  1/2 Square Length 46mm Pin type

Ko-ken 15544A-P 5/8 Sq. Dr. Adaptor 1/2 Square Length 46mm Pin type

SKU: KK-15544A-P
MPN: 15544A-P

Sale price $49.56 List price $61.94
Save $12.38
Ko-ken 15555AL 5/8 Sq. Dr. Locking Adaptor  5/8 Square Length 70mm Locking Quick Release

Ko-ken 15555AL 5/8 Sq. Dr. Locking Adaptor 5/8 Square Length 70mm Locking Quick Release

SKU: KK-15555AL
MPN: 15555AL

Sale price $149.80 List price $187.24
Save $37.44
Ko-ken 15566A 5/8 Sq. Dr. Adaptor  3/4 Square Length 48mm Hole type

Ko-ken 15566A 5/8 Sq. Dr. Adaptor 3/4 Square Length 48mm Hole type

SKU: KK-15566A
MPN: 15566A

Sale price $49.56 List price $61.94
Save $12.38
Ko-ken S/A51 5/8" Pin (100 pieces)

Ko-ken S/A51 5/8" Pin (100 pieces)

SKU: KK-S/A51
MPN: S/A51

Sale price $89.20 List price $111.49
Save $22.29
Ko-ken S/B51 5/8" O Ring (100 pieces)

Ko-ken S/B51 5/8" O Ring (100 pieces)

SKU: KK-S/B51
MPN: S/B51

Sale price $185.69 List price $232.11
Save $46.42